<template>
  <div>
    <!-- 面包蟹导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        :closable="false"
        center
        show-icon
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本消息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本消息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的ITenm项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableDate"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示的是要上传到的后端管理API地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!--富文本编辑器组建 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预选-->
    <el-dialog
      title="提示"
      :visible.sync="previewVisible"
      width="50%"
    >
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>

import _ from 'lodash';

export default {
  data() {
    return {
      activeIndex: "0",
      // 添加表单的数据对象
      addForm: {
        goods_name: "",
        // 商品所属的分类数据
        goods_cat: [],
       
        goods_price: 0,
         goods_number: 0,
        goods_weight: 0,
        // 商品的详情描述
        goods_introduce:'',
        // 图片的数据
        pics: [],
        
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请输入商品分类", trigger: "blur" },
        ],
      },
      catelist: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
        expandTrigger: "hover",
      },
      // 动态参数列表的数据
      manyTableData: [],
      // 静态属性列表
      onlyTableDate: [],
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      // 图片上传组建的headers请求头
      // 应为是无效的token值所以要获取有效的token
      headerObj: { Authorization: window.sessionStorage.getItem("token") },
      // 图片的路径
      previewPath:'',
      previewVisible:false
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品列表数据失败");
      }
      // this.$message.success('获取商品列表数据成功')
      // console.log(res)
      this.catelist = res.data;
      // console.log(this.catelist);
    },
    // 级联选择器发生变化会发生这个函数
    handleChange() {
      console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log(activeName,oldActiveName)
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    async tabClicked() {
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "many",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数失败");
        }
        console.log(res.data);
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_length === 0 ? [] : item.attr_vals.split(",");
        });
        this.manyTableData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "only",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性失败");
        }
        this.onlyTableDate = res.data;
      }
    },
    // 处理图片的预览效果
    handlePreview(file) {
      console.log(file);
      this.previewPath = file.response.data.url
      this.previewVisible =true
    },
    // 处理移出图片的操作
    handleRemove(file) {
      console.log(file);
      // 1.获取要删除的图片的零食路径
      const filePath = file.response.data.tmp_path;
      // 2.从pics 数组中,找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath);
      // 3.调用数据的splice方法，把图片的信息对象，从pics数组中移出
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm);
    },
    // 监听图片上传的成功事件
    handleSuccess(response) {
      console.log(response);
      // 1.拼接得到的一个图片信息对象
      const picInfo = { pic: response.data.tmp_path };
      // 2. 讲图片的信息对象，push到pics数组中
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    // 添加商品
    add(){
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // lodash cloneDeep(obj)
        // 深拷贝：：：；应为级联选择框会发生bug所以需要使用深拷贝
        // / 会出现bug的代码
      //  1.1.1this.addForm.goods_cat = this.addForm.goods_cat.join(',')
        // 应为级联选择框下的获取的必须是个数组而你操作1.1.1这个代码会将数组转换成字符传，
        // 然后级联选择框会发生冲突，所以要进行深拷贝
       const form =  _.cloneDeep(this.addForm)
       form.goods_cat = form.goods_cat.join(',')
      //  处理动态属性
      this.manyTableData.forEach(item =>{
        const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(",")}
        this.addForm.attrs.push(newInfo)
      })
      // 处理静态属性
      this.onlyTableDate.forEach(item=>{
        const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals}
        this.addForm.attrs.push(newInfo)
      })
      form.attrs =  this.addForm.attrs
      console.log(form)
      //发起请求添加商品
      // 商品的名称,必须是唯一的
      const {data:res} = await this.$http.post('goods', form)
      if(res.meta.status !==201){
       return this.$message.error('添加商品失败！') 
       }
       console.log(res.meta.status)
       this.$message.success('添加商品成功')
       this.$router.push('/goods')
      })
      

    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>
<style scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>